{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["biology", "astronomical object", "event", "time", "disease", "instrument"], "input": "Chevaliers , or knights in the Middle Ages , engaged in what were usually non-physical and non-marital relationships with women of nobility whom they served ."}
{"biology": [], "astronomical object": [], "event": [], "time": ["Middle Ages"], "disease": [], "instrument": []}